RomIterator.cpp

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00032 
00033 #include "RomId/RomIterator.h"
00034 #include "Masters/OneWireMaster.h"
00035 
00036 using namespace OneWire;
00037 using namespace OneWire::RomCommands;
00038 
00039 bool ForwardSearchRomIterator::lastDevice() const
00040 {
00041     return searchState.last_device_flag;
00042 }
00043 
00044 OneWireMaster::CmdResult ForwardSearchRomIterator::selectFirstDevice()
00045 {
00046     return OWFirst(master(), searchState);
00047 }
00048 
00049 OneWireMaster::CmdResult ForwardSearchRomIterator::selectNextDevice()
00050 {
00051     return OWNext(master(), searchState);
00052 }
00053 
00054 OneWireMaster::CmdResult ForwardSearchRomIterator::reselectCurrentDevice()
00055 {
00056     return OWResume(master());
00057 }
00058 
00059 OneWireMaster::CmdResult ForwardSearchRomIterator::selectFirstDeviceInFamily(uint8_t familyCode)
00060 {
00061     searchState.findFamily(familyCode);
00062     return OWNext(master(), searchState);
00063 }
00064 
00065 OneWireMaster::CmdResult ForwardSearchRomIterator::selectNextFamilyDevice()
00066 {
00067     searchState.skipCurrentFamily();
00068     return OWNext(master(), searchState);
00069 }
00070 
00071 OneWireMaster::CmdResult SingledropRomIterator::selectDevice(const RomId &)
00072 {
00073     return selectDevice();
00074 }
00075 
00076 OneWireMaster::CmdResult MultidropRomIterator::selectDevice(const RomId & romId)
00077 {
00078     return OWMatchRom(master(), romId);
00079 }
00080 
00081 OneWireMaster::CmdResult MultidropRomIteratorWithResume::selectDevice(const RomId & romId)
00082 {
00083     OneWireMaster::CmdResult result;
00084     
00085     if (romId == lastRom)
00086     {
00087         result = OWResume(master());
00088     }
00089     else
00090     {
00091         result = OWMatchRom(master(), romId);
00092         lastRom = romId;
00093     }
00094     
00095     return result;
00096 }